
public class Test1 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		int x = 12;
		int y = 13;
		foo(x, y);
		System.out.println(x);
	}
	
	public static void foo(int x, int y){
		int z;
		z = x;
		x = y;
		y = z;
		
	}

}
